[ale] dd hard drive cloning over a network

[Jim Kinney]

It picks up the sector identifying ot as a lvm. On write the contents go
inside the lvm boundary and an lvm inside a real lvm doesn't work.
On Jan 4, 2011 8:29 PM, "David Tomaschik" <david at systemoverlord.com> wrote:
> Why would dd straight to & from LVM do anything? A logical volume
> should be just a block device to any app, including dd.
>
> David
>
>
> On 01/04/2011 04:24 PM, Ken Price wrote:
>>
>> James gave you some good suggestions, here's how you do it over SSH
>> from the source machine.
>>
>> * (On source machine) dd if=/dev/sda | ssh root@[destination] dd
>> of=/dev/sda
>>
>> Something that's important to note. You don't want to copy a LVM
>> volume over the network to another LVM volume. It won't work
>> correctly and you'll corrupt the destination volume. You can,
>> however, copy to a file on the remote machine, and then to the
>> destination LVM volume.
>>
>> * (On source machine) dd if=/dev/VolGroup/LogVol00 | ssh
>> root@[destination] dd of=/home/somefilename.dump
>> * (On destination machine) dd if=/home/somefilename.dump
>> of=/dev/VolGroup/DestinationVol
>>
>> I always add bs=64k to the source dd command to speed things up, but
>> it's up to you. Hope this helps.
>>
>> Ken
>>
>>
>>
>> On Tue, 4 Jan 2011 20:01:58 +0000, wrote:
>>
>>> Hi..
>>> I need to dd a hard drive from a machine on one box to a machine on
another box over a tcp network connection. How would you do that? Would some
kind of fancy command using netpipes do the job?
>>>
>>> -Jim Butler
>>> Sent from my BlackBerry Smartphone provided by Alltel
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>>
>
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